Habits of this kind, then, fall without the pale of vice, just as the brutal character does; but when a man who has these impulses conquers or is conquered by them, this is not to be called [continence or] incontinence strictly, but only metaphorically, just as the man who behaves thus in the matter of his angry passions cannot be strictly called incontinent. For even folly and cowardice, and profligacy, and ill temper, whenever they are carried beyond a certain pitch, are either brutal or morbid When a man is naturally so constituted as to be frightened at anything, even at the sound of a mouse, his cowardice is brutal [inhuman]; but in the well-known case of a man who was afraid of a weasel, disease was the cause. And of irrational human beings, those who by nature are devoid of reason, and live only by their senses, are to be called brutal, as some races of remote barbarians, while those in whom the cause is disease ( e.g. epilepsy) or insanity are to be called morbidly irrational.